150038-89-4Relevant academic research and scientific papers
One-pot conversion of 4-aryl-3-butenylazides into benz[f]indoles by a consecutive staudinger reaction / aza Wittig reaction / intramolecular Diels-Alder cycloaddition process
Molina, Pedro,Lopez-Leonardo, Carmen
, p. 2809 - 2812 (1993)
One-pot conversion of azides 1 into benz[f]indoles 5 based on the sequential treatment of azides 1 with triphenylphosphine, diphenyl ketene and further heating in the presence of activated manganese dioxide is reported.
A Straightforward Preparation of Benzindoles by an Intramolecular Diels-Alder Cycloaddition of Unsaturated Ketenimines.
Molina, Pedro,Lopez-Leonardo, Carmen,Alcantara, Julian
, p. 5027 - 5036 (2007/10/02)
An intramolecular Diels-Alder cycloaddition of the ketenimines 3, available by aza Wittig reaction between iminophosphoranes 2, derived from azido olefins 1, and diaryl ketenes followed by an oxidative aromatization of the cycloadduct provided benzindoles 5.Attempts to apply this process either with ethylphenylketene, 5-aryl-4-pentenylazides or with the related carbodiimides failed.
